Good Substrings

combinatorics, data structures, data structures, dp, greedy, greedy, strings

Copper Squander

binary search, data structures, dsu, graphs, greedy, math, sortings, ternary search

Unrequited Love

brute force, data structures

Did Not Go to Print

data structures, implementation

Matrix Puzzle

brute force, data structures, implementation, math, matrices

Beautiful Pillers

constructive algorithms, constructive algorithms, data structures, dp, greedy, implementation

Array Emptying

binary search, binary search, data structures, greedy, greedy

Kia Kio and Tree of Life

data structures, fft, math, trees

AghaBalaSar and Hamed

data structures, dp, trees

KiaKio and Energy Intervals

binary search, bitmasks, data structures, divide and conquer, dsu, greedy, trees, two pointers

What a SauSaGe! It's All Meat

bitmasks, brute force, data structures, math

XOR Transformations (Hard Version)

bitmasks, brute force, data structures, dfs and similar, greedy, math, sortings, strings, trees

Clean Substrings

combinatorics, data structures, math

Deque Malfunction

binary search, data structures, dp, greedy

Falling Concrete

constructive algorithms, data structures, math, sortings

Knife's Pill Farm

data structures, greedy, math

Culling Game

binary search, data structures, implementation, two pointers

1 2 3 and XOR, Where Did Everybody Go?

bitmasks, data structures, divide and conquer, dp, greedy, sortings, two pointers

What Does the Cow Say?

binary search, data structures, dfs and similar, greedy, trees

Come Be My Friend, Don't Be So Scared (Hard Version)

constructive algorithms, data structures, dsu, graphs, hashing, trees, two pointers

Index Removal

binary search, data structures, math

Binary Bubble Sort Inversions

data structures, math, two pointers

Plus Minus Tree

data structures, dfs and similar, dp, graphs, greedy, trees

DivMEX

data structures, math, math, number theory

Beaver's Jumping Track (Hard Version)

data structures, dp, matrices

Beaver's Jumping Track (Easy Version)

data structures, dp, matrices

Busy Beaver

brute force, data structures, divide and conquer, dp, greedy, implementation, sortings

What Will Remain at the End? (Hard Version)

data structures

What Will Remain at the End? (Easy Version)

brute force, data structures, data structures

How Long Until Nothing Remains?

binary search, bitmasks, data structures, greedy, math, sortings

Nightcrawler

data structures, dfs and similar, dp, greedy, greedy, sortings, trees

Chronostasis

binary search, data structures, greedy

Hypercarp and the Control Panel

brute force, data structures, two pointers

Risky Tower

binary search, brute force, data structures, greedy, sortings

Boss Fight

data structures, greedy, greedy

Double-Rift Dial

data structures, dfs and similar, dsu, implementation, two pointers

Paths on a Grid

data structures, dp, hashing

XOR Sorting (Hard Version)

bitmasks, data structures, greedy

Connect Connect See

brute force, brute force, data structures

Yura and Deadlines

data structures, dp

Masha and the Garland

data structures, dp, greedy, implementation, math, number theory, strings

Summer Vacation

data structures, data structures, data structures, dp, dp, probabilities, trees

Unstable Elements

brute force, brute force, data structures, implementation, sortings, two pointers, two pointers

Predominant Frequency Division

data structures, greedy, implementation, math

Summmon

binary search, data structures, greedy, implementation, math, number theory

A Bit Odd

data structures, games, greedy, math

The end of this world,

data structures, divide and conquer, dsu, graphs

Revival

binary search, data structures, math, two pointers

Slime and Queries

data structures, greedy, trees

Paint the Array

data structures, dp, greedy

Permutation Commutation

data structures, graphs, greedy

Criterion in Burlandia

binary search, bitmasks, brute force, brute force, data structures, data structures, dfs and similar, divide and conquer, implementation, trees, two pointers

Stripe, Token and Two Players

data structures, dp, games

Vessels, Heights and Two Versions (Hard Version)

data structures, dfs and similar, dsu, greedy, implementation, two pointers

Goods on the Shelf

brute force, data structures, implementation, two pointers

Minimum Influence

binary search, data structures, greedy, implementation, math, sortings, two pointers

Roadworks

binary search, data structures, dp, greedy, two pointers

Deconstruction Tree

combinatorics, data structures, dp, graphs, trees

Amanojaku and Sequence (Hard Version)

combinatorics, data structures, implementation, math

Sanae, Cross and Color

binary search, data structures, implementation

Drowning

binary search, data structures, math

It Just Keeps Going Sideways

binary search, data structures, data structures, dp, dp, greedy, greedy, math, math

It All Went Sideways

binary search, data structures, dp, greedy

Palindromex

binary search, brute force, constructive algorithms, data structures, greedy, implementation, two pointers

Mental Monumental (Hard Version)

data structures, greedy, math, two pointers

Mental Monumental (Easy Version)

binary search, data structures, greedy, math, two pointers

Zhily and Permutation

data structures, divide and conquer, trees

Zhily and Barknights

binary search, data structures, dp, math, sortings, two pointers

Building Tree

data structures, divide and conquer, dsu, graphs, graphs, implementation

Permutation Construction

constructive algorithms, data structures, sortings

MEX Replacement on Tree

data structures, implementation, math, trees

Definitely Larger

binary search, constructive algorithms, data structures, graphs, greedy, sortings

Star Map

constructive algorithms, data structures, geometry, greedy, sortings

A Simple Problem

binary search, data structures, greedy, math, trees

Simply Sitting on Chairs

data structures, greedy

Dynamic Values And Maximum Sum

data structures, data structures, greedy, implementation, trees

Hanabi

binary search, data structures, dp, dsu, flows, graph matchings, graphs, greedy

Where's My Water?

data structures, divide and conquer, dp, math

Parallel Sums

data structures, geometry

Christmas Tree Un-decoration

data structures, dp, trees

Simons and Diophantus Equation

bitmasks, brute force, data structures, math, number theory

Simons and Reconstructing His Roads

constructive algorithms, constructive algorithms, constructive algorithms, constructive algorithms, data structures, data structures, dsu, graphs

Simons and Dividing the Rhythm

combinatorics, data structures, dp, dsu, math, string suffix structures, strings, strings, strings

Simons and Beating Peaks

data structures, data structures, divide and conquer, dp, dp, greedy, implementation, trees

Sum of Fractions

binary search, brute force, combinatorics, data structures, greedy, math, number theory, two pointers

Probabilistic Card Game

binary search, data structures, games, greedy, math, ternary search

Monotone Monochrome Matrices (Easy Version)

data structures, data structures, data structures, data structures

Monotone Monochrome Matrices (Hard Version)

constructive algorithms, data structures, hashing, math

Monotone Monochrome Matrices (Medium Version)

data structures, hashing

Binary Not Search and Queries

data structures, greedy, implementation

Lost Civilization (Hard Version)

data structures, dp

Lost Civilization (Easy Version)

data structures, data structures

Mooclear Reactor 2

brute force, data structures, greedy, implementation, sortings

Sum of MEX

*special problem, combinatorics, data structures, dp, math

Fuzzy Concatenation (Hard version)

binary search, bitmasks, data structures, dp, greedy, string suffix structures

Fuzzy Concatenation (Easy Version)

binary search, bitmasks, brute force, data structures, greedy, string suffix structures

Double Bracket Sequence

data structures, dp, expression parsing, flows, greedy, strings

Idiot First Search and Queries

binary search, data structures, dp, graphs, trees

Again Trees... (hard version)

bitmasks, data structures, dfs and similar, dp, fft, trees

Replace and Sum

data structures, greedy